legoktm@fluorine:/a/mw-log/archive$ zgrep -c "Could not find local user data for" exception.log-20160*
exception.log-20160412.gz:52
exception.log-20160413.gz:62
exception.log-20160414.gz:30
exception.log-20160415.gz:48
exception.log-20160416.gz:24
exception.log-20160417.gz:20
exception.log-20160418.gz:22
exception.log-20160419.gz:34
exception.log-20160420.gz:958
exception.log-20160421.gz:36
exception.log-20160422.gz:664
exception.log-20160423.gz:62
exception.log-20160424.gz:10
exception.log-20160425.gz:30
exception.log-20160426.gz:30
exception.log-20160427.gz:20
exception.log-20160428.gz:28
exception.log-20160429.gz:14
exception.log-20160430.gz:32
exception.log-20160501.gz:18
exception.log-20160502.gz:48
exception.log-20160503.gz:28
exception.log-20160504.gz:36
exception.log-20160505.gz:306
exception.log-20160506.gz:168
exception.log-20160507.gz:80
exception.log-20160508.gz:90
exception.log-20160509.gz:62
exception.log-20160510.gz:56
exception.log-20160511.gz:78
exception.log-20160512.gz:70
exception.log-20160513.gz:108
exception.log-20160514.gz:12
exception.log-20160515.gz:14
exception.log-20160516.gz:20
exception.log-20160517.gz:34
exception.log-20160518.gz:26
exception.log-20160519.gz:20
exception.log-20160520.gz:42
exception.log-20160521.gz:30
exception.log-20160522.gz:30
exception.log-20160523.gz:22
exception.log-20160524.gz:36
exception.log-20160525.gz:22
exception.log-20160526.gz:40
exception.log-20160527.gz:58
exception.log-20160528.gz:94
exception.log-20160529.gz:22
exception.log-20160530.gz:38
exception.log-20160531.gz:114
exception.log-20160601.gz:374
exception.log-20160602.gz:62
exception.log-20160603.gz:40
exception.log-20160604.gz:48
exception.log-20160605.gz:34
exception.log-20160606.gz:30
exception.log-20160607.gz:52
exception.log-20160608.gz:116
exception.log-20160609.gz:150
exception.log-20160610.gz:128
exception.log-20160611.gz:412
exception.log-20160612.gz:256
exception.log-20160613.gz:1052
exception.log-20160614.gz:512
exception.log-20160615.gz:370
exception.log-20160616.gz:302
exception.log-20160617.gz:392
exception.log-20160618.gz:280
exception.log-20160619.gz:350
exception.log-20160620.gz:288
exception.log-20160621.gz:346
exception.log-20160622.gz:316
exception.log-20160623.gz:490
exception.log-20160624.gz:240
exception.log-20160625.gz:270
exception.log-20160626.gz:166
exception.log-20160627.gz:214
exception.log-20160628.gz:214
exception.log-20160629.gz:316
exception.log-20160630.gz:1354
exception.log-20160701.gz:420
exception.log-20160702.gz:352
exception.log-20160703.gz:196
exception.log-20160704.gz:246
exception.log-20160705.gz:298
exception.log-20160706.gz:872
exception.log-20160707.gz:3284
exception.log-20160708.gz:4056
exception.log-20160709.gz:4686
exception.log-20160710.gz:4084
exception.log-20160711.gz:4730